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Recent content by alchemon

  1. alchemon

    MS MechE with Math Bachelors

    From a pure employment perspective, I would find no differences between a math Ba and then MS Mech Engr, or math BA and then BS Mech Engr. Logically to me, it would make more sense for you to get the masters because it is the higher degree. My primary concern would be whether you could become...
  2. alchemon

    MS MechE with Math Bachelors

    Do you aspire to become a professional engineer? If so, check your target jurisdiction. Some may or may not accept a masters in lieu of a bachelor's. Also, most masters programs are not ABET accredited, which again is important if seeking professional licensure.
  3. alchemon

    Area Classification of Natural Gas Valve Manifold

    NFPA 497 says a lot of things. Depending on the valve or vessel type, 15' applies or doesn't. Look at the diagrams. It tells you the answers. I have never heard of digging much further than the NFPA 497 diagrams for hazardous area classification. Remember, NFPA 497 classifies electrical...
  4. alchemon

    Pipeline Strain

    Yes, good points made - fully restrained is an idealized condition where as we all know, the soil does not fully restrain (for underground).
  5. alchemon

    Pipeline Strain

    LittleInch, what would be the characteristic length for axial strain for a buried/restrained line? Overall length cannot move much in that case.
  6. alchemon

    Pipeline Strain

    Hello all, First, someone asked as to where I found the 2% strain reference: ASME B31.8, 833.5, allows for specifically design exceeding yield, and (b) of this same section does specifically mention a strain limit of 2% if you design for exceeding yield (various criteria must be met). Second...
  7. alchemon

    Pipeline Strain

    Hello all, I have done stress calculations for multiple years and have a good understanding of hoop vs longitudinal stresses for buried pipelines. Recently I have gotten involved with pipeline strain but I am struggling to understand two key things: First, several codes talk about a 0.5% or...
  8. alchemon

    pipeline ROW restoration

    I think the OP should make an important distinction with their contractor. Things that got get wasted because it is bad (aka not to spec, the wrong size for rock, spills out of the truck, whatever) is not their problem. If seed and/or aggregate is correctly installed and then is later damaged...
  9. alchemon

    1099 Structural Work

    Just make sure that you have a good contract with them. Something along the lines of.... They accept financial liability for failures should be satisfactory. They probably just need your seal for permits and the like. I'm sure everyone can come to an agreeable solution. But you should be wary of...
  10. alchemon

    Costs of not renewing PE licenses in remote states

    I agree with TigerGuy... Just call the boards of the states you are considering letting lapse. Just tell them that you are considering not renewing because you aren't actively practicing there. Ask them the same questions as far as future renewal and/or fees and then follow up with a summary...
  11. alchemon

    pipeline ROW restoration

    Never seen a published value because... It depends on the means and methods. 20% is comical. I'd reject it and ask why they are allowing that much to go to waste. If they are, that isn't your problem. 5% is probably right, so you should be willing to expect to accept 10%. In the future take...
  12. alchemon

    Best soil for filling under drainage ditches and creeks

    Creeks are filled in all the time for roadways and then they are diverted to a new trench or a so called stream relocation. But yes I meant to fill in to the original creek bottom.
  13. alchemon

    Best soil for filling under drainage ditches and creeks

    I am working on a project that involves laying fiber lines for several miles. We will be crossing multiple creeks and drainage ditches. Several of the creeks are extremely eroded with silty bottoms, and we will need to fill them in to allow for crossing. Similarly, several drainage ditches are...
  14. alchemon

    Stream Channel Stabilization

    Hello all, Thanks for all the responses. To answer a few questions: 1. Yes on certain projects HDDs/trenchless are feasible/economical, on others they are not. 2. The utility line general permits require that the elevations be returned to the original condition. I don't see how you can argue...
  15. alchemon

    Stream Channel Stabilization

    Outside of setting a box culvert or bridge pier into the channel, do you have anything else in mind? For example, I doubt you could pull a permit for riprap in the channel unless it was local to assist scour around culvert/piers. What if you had something more like a linear sewer utility...
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